package com.znn.instrument;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
	public int sum(int a, int b) {
		return a+b;
	}

	public int minus(int a,int b){
		return a-b;
	}
}
